[The effect of combined magnetic fields, adjusted to ion-cyclotron resonance for Ca ions, on intensity of division in planaria].

The combination of a constant (42 mkT1) and parallel to it a changing magnetic field on a frequency of 32 Hz (it corresponds to cyclotron frequency for Ca2+ ions) is shown to have a changing magnetic field amplitude-dependent effect on intensity of division in planaria. A stimulating effect has been observed at the magnitude of a changing component equal to 100 nT, but the amount of division significantly decreased at 250 nT and no impact of the magnetic field was registered at 500 nT1.